Kirsten Dunst’s purse burglar may or may not be a “Mongoloid,” as his own lawyer has called him, but he’s officially guilty.

A Manhattan jury convicted Brooklyn car mechanic James Jimenez of burglary yesterday, finding that he had unlawfully entered a penthouse-turned-green room at the SoHo Grand Hotel during a 2007 movie shoot starring the actress and Brit actor Simon Pegg, taking the stars’ bags and electronics.

“They were just trespassing and opportunistic, I think,” said one juror, a 28-year-old software developer who laughed to remember defense lawyer Robert Parker calling Jimenez “probably a little Mongoloid” during closings.

“Oh, that was hilarious when he said that about his own client.”

Jurors had spent hours watching and re-watching hotel surveillance footage of Jimenez and Bienerman loping aimlessly around the hotel in their t-shirts, shorts and baseball hats — at one point giving each other high-fives in an elevator.